These include Tom Huddlestone and Curtis Davies (both to Derby County), Josh Tymon (to Stoke City), Ahmed Elmohamady (to Aston Villa) and Harry Maguire and Eldin Jakupovic (both to Leicester City).
The fee could rise to £8million with add-ons.
Effectively, we're offloading an unwanted, unneeded midfielder and securing a talented young left-back - at no extra cost.
Police release new sketch of suspect in murder of in teens
Police have released a sketch of the main suspect in the murder of two teenage girls who disappeared near Delphi in February . Their bodies were found the next day in a wooded area. "We've always felt like we are going to solve this", he added.
Robertson made 33 league appearances, 31 of those starts, for the Tigers last term as they suffered the dreaded drop.
Liverpool turned to the Scotland worldwide after missing out on Fulham's Ryan Sessegnon.
South Korea proposes rare military talks with North at Panmunjom
It is North Korea that has been provocative with, for example, the bombardment of the South Korean island of Yeonpyeong in 2010. It is anxious about an influx of refugees and possible USA troops stationed on its border in a unified Korea.
Robertson, meanwhile, is expected to join Liverpool in a £10m deal from the Championship side after impressing last season.
In an official statement, Liverpool paid tribute to the 30 year old midfielder, "Everyone at Liverpool FC thanks Lucas for his vast contribution to the club and wishes him and his family all the best for the future".
Dignitaries grieve death of math genius Maryam Mirzakhani
Mirzakhani was born in Tehran in 1977, and was twice awarded the International Mathematical Olympiad's gold medal in her youth. Mirzakhani studied the complexities of curved surfaces such as spheres, doughnut shapes and hyperbolas.